whew... I rarely drive under 75, so I guess I am alright

I run Marathons on my trailer, I keep them at 50psi and have never had an issue. (knock on wood!) But I will say that I had a bass boat once that had regular passenger tires on the trailer when I bought it, seems like they were Goodyear Eagles, never had a problem with them either except it seemed like the trailer bounced a little more. Which might of had something to do with the weaker side walls in the passenger tire. But even though I have ran passenger tires in the past, I have no plans of ever doing it again. I really dont see a reason to chance it.